﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;

namespace MobileWeb
{
    public class Utilities
    {
        public static string GetKeySetting(string key)
        {
            return System.Configuration.ConfigurationSettings.AppSettings[key];
        }

        public static string Root
        {
            get
            {
                string sPath = HttpContext.Current.Request.ApplicationPath;
                if (sPath.Equals("/"))
                {
                    sPath = HttpContext.Current.Request.Url.AbsoluteUri.Substring(0, HttpContext.Current.Request.Url.AbsoluteUri.LastIndexOf("/"));
                }
                return sPath;
            }
        }

        public static DataTable GetSubDataSource(DataTable dtSource, int iStartIndex, int iEndIndex)
        {
            try
            {
                DataTable dtTemp = dtSource.Clone();
                if (iEndIndex > dtSource.Rows.Count) iEndIndex = dtSource.Rows.Count;
                for (int i = iStartIndex; i < iEndIndex; i++)
                {
                    dtTemp.ImportRow(dtSource.Rows[i]);
                }
                return dtTemp;
            }
            catch (Exception exp)
            {
                return new DataTable();
            }
        }

        public static bool isMobileBrowser()
        {
            //GETS THE CURRENT USER CONTEXT
            HttpContext context = HttpContext.Current;

            //FIRST TRY BUILT IN ASP.NT CHECK
            if (context.Request.Browser.IsMobileDevice)
            {
                return true;
            }
            //THEN TRY CHECKING FOR THE HTTP_X_WAP_PROFILE HEADER
            if (context.Request.ServerVariables["HTTP_X_WAP_PROFILE"] != null)
            {
                return true;
            }
            //THEN TRY CHECKING THAT HTTP_ACCEPT EXISTS AND CONTAINS WAP
            if (context.Request.ServerVariables["HTTP_ACCEPT"] != null &&
                context.Request.ServerVariables["HTTP_ACCEPT"].ToLower().Contains("wap"))
            {
                return true;
            }
            //AND FINALLY CHECK THE HTTP_USER_AGENT 
            //HEADER VARIABLE FOR ANY ONE OF THE FOLLOWING
            if (context.Request.ServerVariables["HTTP_USER_AGENT"] != null)
            {
                //Create a list of all mobile types
                string[] mobiles =
                    new[]
                {
                    "midp", "j2me", "avant", "docomo", 
                    "novarra", "palmos", "palmsource", 
                    "240x320", "opwv", "chtml",
                    "pda", "windows ce", "mmp/", 
                    "blackberry", "mib/", "symbian", 
                    "wireless", "nokia", "hand", "mobi",
                    "phone", "cdm", "up.b", "audio", 
                    "SIE-", "SEC-", "samsung", "HTC", 
                    "mot-", "mitsu", "sagem", "sony"
                    , "alcatel", "lg", "eric", "vx", 
                    "NEC", "philips", "mmm", "xx", 
                    "panasonic", "sharp", "wap", "sch",
                    "rover", "pocket", "benq", "java", 
                    "pt", "pg", "vox", "amoi", 
                    "bird", "compal", "kg", "voda",
                    "sany", "kdd", "dbt", "sendo", 
                    "sgh", "gradi", "jb", "dddi", 
                    "moto", "iphone"
                };

                //Loop through each item in the list created above 
                //and check if the header contains that text
                foreach (string s in mobiles)
                {
                    if (context.Request.ServerVariables["HTTP_USER_AGENT"].
                                                        ToLower().Contains(s.ToLower()))
                    {
                        return true;
                    }
                }
            }

            return false;
        }
    }
}